The Ravens had 8 Pro bowlers in 2003!!
700,000
as of 2013, there have been 91 pro bowlers
3
There is a Professional Bowlers Association which conducts tournaments and events for pro bowlers. There are also bowling leagues that allow amateur bowlers compete on lane conditions similar to what the professionals use during pro tournaments. At this time, there is no league specifically and selectively for Pro Bowlers.
Both teams have had many players play in the NFL Pro Bowl.
They practice probably anywhere from 4 to 6 hours a day.
University of Miami
8
Pac 10
It can be reasonably disputed that he is not. There are many excellent bowlers.
Many professional bowlers have sponsorship arrangements.